JP2002359765A - Data presentation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reflecting mirror that is placed in a way of not cutting off the view of a user onto data in a data presentation device. SOLUTION: The data presentation device 10 is provided at least with a data placing plate 11 on which data 12 such as a picture and writing original or a real thing are placed, a reflecting mirror 33 places above the data placing plate, and a video camera 40 that is fitted near a depth corner wherein a rear face 11c and a side face 11d (or 11e) of the data placing plate cross each other and captures an image light of the data reflected by the reflecting mirror. In this device 10, the optical axis of the reflecting mirror to the picture and writing original is set nearly perpendicularly to the placing face of the picture and writing original to be placed on the data placing plate and the optical axis of the reflecting mirror to the picture and writing original is shifted by a prescribed amount toward the rear face or the depth corner of the data placing plate from a center point 'O' of the picture and writing original 12G.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a reflector on a material placed on a material mounting table, and installing a video camera at a back corner of the material mounting table. The present invention relates to a material presentation device configured to reflect image light of a placed material with a reflecting mirror and take in the video camera.

[0002]

2. Description of the Related Art Conventionally, as audio-visual equipment used for conferences and lectures, a document such as a document or a substantial object is placed on a document mounting table, and the material is irradiated with illumination light emitted from a lighting device. A material presenting apparatus that photographs this material with a video camera installed above and displays an image of the photographed material on a monitor television or projects the image on a screen to enlarge and display the material is often used.

[0003] Various types of structures are employed in this type of material presenting apparatus, and some structural forms of a conventional material presenting apparatus will be described below.

FIG. 10 is a perspective view showing a first conventional example of a material presenting apparatus, FIG. 11 is a side view showing a second conventional example of a material presenting apparatus, and FIG. 12 is a third conventional example of image input. It is the perspective view which showed the apparatus (material presentation apparatus).

[0005] First, in a data presentation device 100 of a first conventional example shown in FIG. 10, a data placement table 101 serving as a base of the device 100 is formed in a thin box shape. The material mounting surface 101a, which is the upper surface of the device 101, is formed flat. The document 102 such as a document or a document is placed on the document mounting surface 101a of the document mounting table 101.
Can be placed. In addition, the material mounting surface 10
A first arm 103 is attached to the rear end of the first arm 103 so as to be rotatable in the vertical direction (arrow direction), and a video camera 104 is attached to an upper end of the first arm 103 so as to be rotatable in the arrow direction. Have been. And when shooting,
With the first arm 103 standing upright, the video camera 10
In step 4, the video camera 104 is folded on the document mounting surface 101a by lowering the first arm 103 when not in use, while the document 102 mounted on the material mounting surface 101a is photographed. Further, a pair of second arms 105, 105 are attached to the left and right ends behind the material placing surface 101a, and a pair of lighting tools 106, 106 are attached to the upper ends of the pair of second arms 105, 105, respectively. It is attached toward the mounting surface 101a. Also, the document table 101
An operation panel unit 107 in which operation buttons, a liquid crystal panel, and the like are arranged is provided at a front portion of the document table 10.
An image signal processing unit 108 is provided in the unit 1 for processing an image captured by the video camera 104 and sending a video output to a monitor television or a projector (not shown).

[0006] Therefore, the material presentation device 10 having the above-described configuration.
According to 0, the material 10 placed on the material placement surface 101a
2 can be directly taken into the video camera 104, so that the configuration of the device 100 is simplified.

[0007] Next, in the data presentation device 200 of the second example of the related art shown in FIG. It extends toward the front (inside) of the document mounting table 201. Further, on the upper surface of the material mounting table 201, a material mounting surface 201a is formed as a flat surface. In addition, a first reflecting mirror (mirror) 2 is placed above a document 204 such as a document or an actual object placed on the document placing surface 201a.
05 is an arm 203 provided above the material placing surface 201a
Mounted inside. A second reflecting mirror (mirror) 206 and a video camera 20
7 is attached.

Accordingly, the material presentation device 20 having the above configuration
According to No. 0, since the image light of the material 204 is reflected by the first and second reflecting mirrors (mirrors) 205 and 206 and is captured by the video camera 207, the image light from the material 204 can be The optical path length to the video camera 207 can be set long, and the device 200 can be prevented from becoming large.

Next, a third conventional image input device (material presentation device) 300 shown in FIGS. 12A and 12B is disclosed in Japanese Patent Application Laid-Open No. 2000-138856. Briefly, with reference to the same publication, a document placing surface 301a is formed on the upper surface of a main body (material placing table) 301 as a flat surface, and a video camera 305 described later is placed on the document placing surface 301a. Original 302 to be a close subject
Can be placed. Also, the original placing surface 30
1a, an arm 303 is attached to a corner portion on the left rear side of the figure so as to be rotatable in the vertical direction (arrows A1 and A2 directions), and a mirror (reflecting mirror) 304 is attached to an upper end of the arm 303. I have. Also, the housing 301
A video camera 305 is provided on the left side of the camera. The video camera 305 has an arrow so that it can take a posture toward the mirror 304 installed above the document placing surface 301a and a posture toward the front of the main body 301. It is attached to be rotatable in the B1 and B2 directions so that two attitude changes are possible.

Therefore, according to the image input device (material presentation device) 300 having the above-described structure, as shown in FIG. By turning the video camera 304 toward the original 302 and rotating the video camera 305 in the direction of arrow B1 to stand on the original mounting surface 301a, the original mounting surface 3
Image light of the original 302 placed on the
And can be captured by the video camera 305.

On the other hand, from the state of FIG.
As shown in (b), the video camera 305 is pointed by the arrow B2.
When turning toward the direction and facing the front of the main body 301,
It can capture a distant subject such as the screen 306.

[0012]

By the way, in the material presentation device 100 of the first example of the prior art shown in FIG. 10, as described above, the material 102 placed on the material placement surface 101a of the material placing table 101 is used. Can be directly taken into the video camera 104, so that the configuration of the apparatus 100 is simplified. However, the document 102 such as a document or a substantial object can be efficiently placed on an image sensor (not shown) provided in the video camera 104. In order to effectively form an image, the video camera 104 needs to be installed at a predetermined distance above the material 102 placed on the material placing surface 101a.
It is necessary to set the optical axis 04 to be substantially perpendicular to the material placing surface 101a and the material 102.

At this time, generally, the position of the video camera is
By using a photographing lens with a short focal length, the video camera 104 can
2, but image distortion increases.

On the other hand, if the angle of view on the document 102 is small by using a photographing lens having a long focal length, the video camera 1
04 can be sufficiently separated from the document 102 and the distortion of the image is reduced, but since the depth of field of the video camera 104 is shallow, it is difficult to focus on all the irregularities of the actual object. The height position of the video camera 104 is set at a predetermined distance from the material mounting surface 101a, taking a middle position between the case where the angle of view is large and the case where the angle of view is small. The position is a position that obstructs the field of view of the user in front, and the video camera 104 is in the way, and the height of the document presenting apparatus 100 is naturally increased, resulting in an increase in size.

Further, in the above-mentioned material presentation device 100,
First arm 10 for attaching video camera 104
Reference numeral 3 denotes a pair of lighting fixtures 10 at the rear portion of the document table 101.
6, 106 for attaching a pair of second arms 10
5 and 105 are provided on the left and right portions of the material mounting table 101, and the operation panel unit 107 is separately provided on the front portion of the material mounting table 101, so that the material 102 can be moved back and forth and left and right on the material mounting surface 101a. If you try, document 102
However, a trouble such as hitting the first arm 103 or the second arm 105, 105, or covering the operation panel 107 with the document 102 occurs, and the operability is poor.

Next, in the data presentation device 200 of the second example of the related art shown in FIG.
The image light of the material 204 placed on the reference material 01a is sequentially reflected by a first reflecting mirror (mirror) 205 provided above the material placing table 201 and a second reflecting mirror (mirror) 206 provided below the material placing table 201. Since the video camera 207 provided in the document mounting table 201 is reflected and taken in, the apparatus 200 can be downsized by installing the video camera 207 at an appropriate position in the document mounting table 201. The first reflecting mirror (mirror) 205 installed above the mounting table 201 covers most of the user's field of view,
The visibility of the material 204 placed on the material placing surface 201a is greatly impaired.

Here, as shown in FIG. 13B, generally, when a video camera is set at a normal video camera position above a document placed on a document mounting table, the video camera is used. When a document document as a subject is photographed by a photographing lens (not shown) having a short focal length attached to the camera, the image size of the document document is substantially the same as the image circle formed by the photographing lens. An image sensor (not shown) having a similar area corresponding to the size is mounted in the video camera.

On the other hand, when a reflecting mirror is installed above the document placed on the document mounting table, the optical axis of the reflecting mirror to the document passes through the center point of the document and moves with respect to this document. It is set almost vertically. Further, in a state substantially equivalent to the case where the video camera is installed at the normal video camera position as described above, the video camera is placed on the front side of the document mounting table so as to capture the image light of the document manuscript reflected by the reflector. If the video camera with the short-focal-length shooting lens is attached to the video camera with a short focal length, the reflector can be set closer to the material, but the area of the reflector becomes larger. FIG. 13
As shown in (a), the user's view of the document is blocked by the reflector.

Therefore, when it is desired to eliminate the obstruction of the field of view due to the reflector when the video camera is placed on the document table, as shown in FIG. 14, the video camera is placed further upward than the normal video camera position. The video camera set at the top and away from the document was moved away from the document so that it was almost equivalent to the case where the angle of view to the document was reduced by using a long focal length shooting lens (not shown). If the position is set to the position, the area of the reflector becomes smaller and the visibility of the user's material becomes better, but the height of the reflector becomes higher and the depth of field of the video camera becomes shallower and out of focus. Will occur. At this time, when a document with a long focal length is mounted on a video camera and a document is photographed, the image circle, the image size of the document, and the area of the image sensor are set at the position of the normal video camera. It is set almost the same as the camera.

Therefore, it is necessary to set an installation position of the reflector at which a good image can be obtained at a position different from the installation position of the reflector shown in FIGS.

Next, in the third conventional input image device (material presentation device) 300 shown in FIGS. 12 (a) and 12 (b),
A distant subject (screen 306) and a close subject (document 3
02) can be selectively photographed.
Here, when photographing a close subject (document 302),
While the arm 303 provided at the left rear corner of the original placing surface 301a of the main body 301 is raised and the mirror 304 is directed to the original 302, as shown in FIG. Since the optical axis to the camera is set obliquely, the video camera 3
In this case, the image of the original 302 taken in the image 05 is distorted. In particular, when a real object or the like is captured, distortion of an image appears remarkably, which is a problem.

In view of the above, in the document presenting apparatus, when adopting a structure in which the image light of the document is taken into the video camera via the reflector, the reflector is installed at a position which does not hinder the user's view of the document. Therefore, an easy-to-use material presentation device is desired.

[0023]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a first invention is to provide a material mounting table for mounting a material such as a document or a substantial object; A reflecting mirror installed above the mounting table, and mounted near a back corner portion where the rear surface and side surface of the material mounting table intersect, for capturing image light of the material reflected by the reflecting mirror A document presentation device having at least a video camera, wherein an optical axis of the reflection mirror to the document is substantially perpendicular to a mounting area surface of the document to be presented on the document mounting table. The document, wherein the position of the optical axis of the reflecting mirror with respect to the document is shifted by a predetermined amount from the center point of the document to the rear side or the rear corner portion of the document table. It is a presentation device.

According to a second aspect of the present invention, in the document presentation apparatus according to the first aspect, the video camera has a photographing lens having a large image circle attached to a front portion in the lens barrel, and a video lens in the lens barrel. This is a document presentation device, wherein an image sensor is attached to a rear part.

According to a third aspect of the present invention, in the document presentation apparatus according to the first aspect, the video camera has a photographing lens having a large image circle attached to a front portion in the lens barrel, and a video lens in the lens barrel. The image sensor attached to the rear part is set to have an area smaller than the area of the image circle on the imaging surface, and the image sensor corresponds to the position of the document image formed in the image circle on the imaging surface. It is a document presentation device characterized by being attached.

Furthermore, a fourth invention provides a material mounting table for mounting a material, a reflector installed above the material mounting table, and a reflector mounted on the material mounting table. A video camera for capturing the image light of the material reflected by the, and a material presentation device having at least an operation panel unit, an arm supporting the reflector above the material mounting table; and the video camera And the operation panel unit is intensively arranged near the back corner where the rear surface and the side surface of the material mounting table intersect on the side opposite to the dominant hand of the user.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a material presentation device according to the present invention will be described below in detail with reference to FIGS.

FIG. 1 is a perspective view showing the use of the material presenting device according to the present invention, and FIGS. 2 (a), 2 (b) and 2 (c) are the top views showing the use of the material presenting device according to the present invention. Figure, front view,
FIG. 3 is a right side view, and FIG. 3 is a perspective view showing the non-use of the document presentation device according to the present invention.

As shown in FIG. 1 and FIGS. 2 (a) to 2 (c), in the material presentation device 10 according to the present invention,
The base 11 is formed in a rectangular shape with a small thickness, and the base 11a serving as the upper surface of the base 11 is formed flat. The document 12 such as a document or a substantial object can be placed on the material placing surface 11 a of the document placing table 11. At this time, for example, an A4 size (length × width = 297 mm × 2)
When the document placing surface 11a is placed on the document placing surface 11a using a document of 10 mm), the size of the document placing surface 11a is usually A4.
The size of the document is set to be horizontally laid such that the longitudinal direction of the document is in the left-right direction (X direction) and the short direction is in the depth direction (Y direction). In addition, the user is located on the front surface (front) 11b side of the material mounting table 11.

When a document is placed on the document placement surface 11a of the document placement table 11 as the document 12, the size of the document placement surface 11a is adjusted to the size of the A4 size document in this embodiment. However, the present invention is not limited to this. For example, a document having a predetermined size such as A3
It suffices if it can be positioned and placed on a.

In the vicinity of the left back corner where the rear surface 11c and the left side surface 11d of the document table 11 intersect on the left hand side of the user, the operation panel unit 20, the reflecting mirror unit 30, the video camera 40 , And the illumination unit 50 are intensively arranged from the front (front side) to the rear (rear side) in the order described above with good operability and portability.

At this time, the operation panel section 20 and the reflecting mirror section 3
0, the video camera 40, and the illuminating unit 50 are intensively provided in the vicinity of the back corner of the user's left hand.
It is a position where there is no hindrance even if the material 12 is freely moved back and forth and left and right on the a.
When the user stands on the front surface 11b side, the user's view is
The position is not obstructed by 30, 40, and 50. In addition, many users are generally right-handed people. For example, when handling the insertion stick with the right hand, the left hand is empty. 12 can be handled, or the operation panel section 20 can be operated with the left hand.
By arranging 0, 30, 40, and 50 in a concentrated manner, the document presentation device 10 can be reduced in size with good portability.

Of course, some of the users have a dominant left hand.
When 0 is configured for left-handed use only, the operation panel unit 20
The reflecting mirror unit 30, the video camera 40, and the illumination unit 50 may be provided intensively near the right back corner where the rear surface 11c and the right side surface 11e intersect with each other. That is, the position where the operation panel unit 20, the reflecting mirror unit 30, the video camera 40, and the lighting unit 50 are installed on the document mounting table 11 may be near the back corner opposite to the dominant hand of the user.

Next, the operation panel section 20 has a function of operating the material presentation device 10, and has a plurality of switch functions as shown in an enlarged view in the upper left circle in FIG. An operation panel 22 having an operation button 21 attached thereto, and an operation panel cover 24 which is openably and closably mounted above the operation panel 22 and covers the operation panel 22 when the cover is closed and has a plurality of operation buttons 23 attached thereto. I have.

In the operation panel section 20, the operation panel 2
2 is raised upward from the material placing surface 11a, and the back surface on the front side of the operation panel 22 is provided upward from the material placing surface 11a with a small interval k. Thus, when an A4 size document is used as the document 12, the document can be moved to the left through the interval k while slightly shifting the document to the near side.

Although the plurality of operation buttons 23 attached to the operation panel cover 24 do not have a switch function by themselves, their positional relationship corresponds to the plurality of operation buttons 21 with switch functions attached to the operation panel 22. When an appropriate operation button 23 is pressed when the operation panel cover 24 is closed, the operation button 21 with a switch function attached to the operation panel 22 is pressed opposite to the operation button 23. Therefore, by detecting the open / close state of the operation panel cover 24, the operation button 21 with the switch function attached to the operation panel 22 performs different switch operations when the operation panel cover 24 is closed and when the operation panel cover 24 is opened. 21 and 23 types of recognition can be doubled.

Next, the above-mentioned reflecting mirror section 30 includes a first arm 31, a reflecting mirror support frame 32, and a reflecting mirror (mirror) 33.
It is composed of In the reflecting mirror section 30, the lower end of the first arm 31 is foldably (rotatably) attached to the first support piece 11f rising upward from the material placing surface 11a of the material placing table 11, At the upper end of the first arm 31, a reflector support frame 32 in which a reflector 33 is mounted is mounted so as to be foldable (rotatable). At this time, the upper part of the reflecting mirror (mirror) 33 is shown in FIG.
As shown in FIGS. 8 (a) to 8 (c) and FIGS. 8 (a) and 8 (b), the reflection mirror supporting frame 32 is covered with the ribbed top plate 32a. 32a is shown in a state where it is removed.

When the material presentation device 10 is not used or when it is carried, as shown in FIG.
The reflecting mirror support frame 32 to which the reflecting mirror 33 is attached is folded on the material placing surface 11a without protruding outward from the material placing surface 11a of the material placing table 11.

On the other hand, when the material presentation device 10 is used, the first arm 31 is erected on the material placing surface 11a of the material placing table 11 via a locking means (not shown), and is set from the upper end of the first arm 31. The reflector supporting frame 32 to which the reflector 33 is attached is extended rightward above the document mounting surface 11a. In this embodiment, the arrangement position and the shape of the reflecting mirror 33 on the material mounting surface 11a are a part of the main part of the present invention, which will be described later in detail.

Next, the above-described video camera 40 is attached to the document placing surface 11a of the document placing table 11 with the photographing lens 41 facing upward, and is inclined. The axis faces the reflecting mirror 33 disposed above the material placing surface 11a of the material placing table 11 when photographing the material 12. The video camera 40 is also a part of the main part of the present invention, and will be described later in detail.

Next, the illuminating section 50 includes a second arm 51 and an illuminating device 52. This lighting unit 5
In the case of 0, the lower end of the second arm 51 rises upward from the material placing surface 11a of the material placing table 11 and the second support piece 11g rises upward.
The illumination device 52 is attached to the upper end of the second arm 51 so as to be freely foldable (rotatably).

When the material presentation device 10 is not used or when it is carried, as shown in FIG.
The lighting device 52 is folded on the material placing surface 11a without protruding outward from the material placing surface 11a of the material placing table 11.

On the other hand, when the material presentation device 10 is used, the second arm 51 is erected on the material placing surface 11a of the material placing table 11 via a locking means (not shown), and the second arm 51 is raised from the upper end of the second arm 51. The illuminating tool 52 extends rightward along the rear surface 11c above the material placing surface 11a.

If the environment around the presentation device 10 is bright, the illumination unit 50 need not be installed.
Therefore, the illumination unit 50 may be attached as needed.

Next, the material placing surface 11a of the material placing table 11
When an A4 size document is applied as the material 12 to be placed thereon, the left end of the A4 size document placed on the material placing surface 11a is located on the left side of the material placing surface 11a. The position of the one support piece 11f when placed horizontally at the right end is regulated.

Further, a second device provided on the left side of the
The dimension s between the right end of the support piece 11g and the right end of the A4 size document placed laterally on the material placing surface 11a is represented by A
Since the size is set to be larger than the short dimension (210 mm) of the 4-size document, the A4-size document can be placed vertically differently from the case where the document is placed horizontally, and between the above-mentioned dimensions s. The A4 size document placed vertically can be freely moved in the front-rear direction.

Here, the arrangement position of the video camera 40 and the arrangement position and shape of the reflecting mirror 33 when using the material presentation device 10 will be described in detail with reference to FIGS.

In the following description, the material placing table 11
A case in which an A4 size document is applied as the material 12 placed on the material placing surface 11a of FIG.
A four-size document will be described as a document 12G.

FIG. 4 is a schematic diagram schematically illustrating the position of the video camera when an A4 size document is photographed by the video camera.

As shown in FIG. 4, the video camera 40
When a four-size document 12G is photographed, the video camera position (normal video camera position) which is generally set generally passes through the center point "O" of the A4-size document 12G to be the subject, and The optical axis K1 of the video camera 40A is set substantially perpendicular to the document 12G, and the optical axis K1 can capture an image within a range of a first circle D1 circumscribing each of the four corners C1 to C4 of the document 12G. The imaging surface “S1” of the video camera 40A is set at the upper position.
At this time, when the document 12G is set as the reference plane, the height of the video camera 40A is set to the first circle D1 having the first circle D1 as the bottom surface.
The height H1 of the apex of the cone P1 and the first circle D
The angle of view toward the video camera 40A facing the range of 1 is α.

On the other hand, in the present invention, the imaging surface “S” of the video camera 40 used in the material presentation device 10 is
This is set near the left rear corner C1 of the document 12G, and the image light of the document 12G from the reflecting mirror 33 is captured by the imaging surface “S” of the video camera 40 set near the corner C1. Is what it is.

Therefore, the image pickup surface "S" of the video camera 40 applied to the present invention is set near the left rear corner C1 of the document 12G.
The video camera 40B has an optical path length condition substantially equivalent to that in the case where the reflecting mirror 33 is inserted between
Is virtually set above the document 12G, the optical axis K2 of the virtually installed video camera 40B is set substantially perpendicular to the document 12G, and the position of the optical axis K2 of the video camera 40B is set. A4 size document manuscript 1
It is displaced (offset) by a first predetermined amount x1 to the left from the position of the center point “O” of 2G, and a second predetermined amount y is rearward.
It is set so as to pass through a displacement point (hereinafter, referred to as an offset point) “F” displaced (offset) by 1 and further, a right front corner C3 of the document 12G is centered on the offset point “F”. Set the second circle D2 so that it passes,
The imaging surface “S2” of the video camera 40B is virtually set at a position on the optical axis K2 at which an image can be taken within the range of the second circle D2. When the original document 12G is set as a reference plane at this time, the height of the video camera 40B is the height H2 of the vertex of the second cone P2 having the second circle D2 as the bottom surface, and the range of the second circle D2. The angle of view to the video camera 40B facing inside is β. At this time, the video camera 40 virtually set
Although B is set above the video camera 40B normally installed, the video camera 4 virtually set
The angle of view β to 0B is the video camera 40B installed normally.
Since the photographing lens 41 (FIGS. 1 and 9) having a large angle substantially equal to the angle of view α is used, the photographing lens of the video camera 40B is an image circle (capturable range) as described later. ) Is the big one.

It is assumed that the characteristics such as the distortion of the image obtained from the virtually installed video camera 40B and the depth of field are almost the same as those of the normally installed video camera 40A.

Here, the angle of view α to the video camera 40A facing the range of the first circle D1 and the radius R1 of the first circle are defined as:
On the other hand, the video camera 40B facing within the range of the second circle D2
And the radius of the second circle R2, the height H1 of the video camera 40A = R1 / ｛tan (α /
2)｝ Height H2 of video camera 40B = R2 / ｛tan (β /
2) It becomes｝.

As described above, the optical axis K2 is set to
The video camera 40B, which is virtually offset above the document 12G by a predetermined amount from the center point “O” of G to the rear left of the document 12G,
G image light is set so as to be substantially equivalent to the case where the image light of G is captured by the imaging surface “S” of the video camera 40 installed near the left rear corner C1 of the document 12G. The installation position and shape of the reflecting mirror 33 are set as shown in FIGS.

FIG. 5 is a schematic diagram schematically illustrating the case where the position and shape of the reflector are set theoretically. FIG. 6 is a diagram schematically illustrating the case where the position and shape of the reflector are actually set. FIG. 7 is a schematic view schematically illustrating the document, FIG. 7 is a plan view for explaining the position of the optical axis of the reflecting mirror on the document, and FIG. FIG. 3 is a plan view as seen in a plan view, and FIG.

First, as shown in FIG. 5, when setting the position and shape of the reflecting mirror 33 from the second cone P2 which is the optical system of the virtually installed video camera 40B, the virtually installed video camera 40B In guiding the imaging surface “S” of the video camera 40 set near the left rear corner C1 of the document 12G via the reflection mirror 33 so as to be substantially equivalent to the imaging surface “S2” of the Center line M
Is set on a vertical bisector of a line connecting the above-described imaging surface “S2” and the above-described imaging surface “S”, and the center line M of the reflecting mirror 33 is set to the optical axis K2 of the video camera 40B. The intersection 33 intersects with the reflection mirror 33 to obtain a straight line having an angle γ of １ ／ of the angle formed by the imaging surface “S” of the video camera 40, the intersection “T”, and the offset point “F”. Is perpendicular to the axis J.

Therefore, the plane orthogonal to the obtained axis J and including the intersection "T" is
A portion of the optical system that intersects the second cone P2 becomes the reflection surface 33a of the reflection mirror 33.

The reflecting surface 33a of the reflecting mirror 33 has a substantially elliptical shape as shown in FIG. 5 when it is theoretically obtained, but the A4 size document 12G, which is the subject, has a rectangular shape. Therefore, in order to match this, as shown in FIG. 6, a portion shown by oblique lines in the substantially elliptical reflection surface 33 a becomes a useless region 33 a 1, and this useless region 33
The shape of the reflecting mirror 33 has the minimum necessary area when the rectangular reflecting surface 33a2 from which a1 is removed is actually used. At this time, when the document manuscript 12G is used as a reference plane, the reflecting mirror 33 is set so that the left end side of the rectangular reflecting surface 33a2 is set higher than the right end side, and is inclined downward and to the right, and is positioned rearward. In comparison, the front side is slightly lowered.

Further, the optical axis of the reflecting mirror 33 to the document 12G is made coincident with the optical axis K2 of the virtually installed video camera 40B. In other words, the optical axis of the reflecting mirror 33 to the document 12G is adjusted. The setting is made so as to be substantially perpendicular to the mounting area surface of the A4 size document 12G to be presented on the document mounting table 11, and the optical axis position of the reflecting mirror 33 to the document 12G is set to the A4 size document. 12G center point "O"
Is set so as to pass through an offset point “F” which is offset by a predetermined amount to the left rear from the point. The placement area surface of the document 12G is a surface in the area where the A4 size document 12G is positioned and placed on the material placement surface 11a of the material placing table 11.

The image light of the document 12G is reflected by the reflecting mirror 33 installed above the document 12G.
It is captured by a video camera 40 installed near the left rear corner C1 of the document 12G. At this time, as described above, since the optical axis of the reflecting mirror 33 to the document 12G is set substantially perpendicular to the document 12G, the document 12G captured by the video camera 40 via the reflecting mirror 33 is set. Is obtained in good condition without distortion.

Note that the offset point “F” on the document 12G through which the optical axis K2 of the virtually installed video camera 40B passes is the optical axis K of the normally installed video camera 40A.
The area of the rectangular reflecting surface 33a2 of the reflecting mirror 33 decreases as the distance from the center point "O" of the document 12G through which the document 1 passes increases, but the height of the reflecting mirror 33 is high as described in the related art. In other words, the more the user moves away from the user (the direction toward the back), the more the user leans toward the front so as to obstruct the view of the user.

In this embodiment, an A4-size document 1 in which the reflecting mirror 33 is the subject from the position of the user's viewpoint.
In order to install the reflecting mirror 33 at a position lower than the height of the normally installed video camera 40A without covering the 2G and obstructing it, more specifically, as shown in FIG.
When the longitudinal dimension of the 4-size document 12G is L, the optical axis position of the reflecting mirror 33 with respect to the document 12G is
In correspondence with the video camera 40 installed near the left rear corner of the document table 11 (FIG. 1), an offset point "F" is set at a position approximately L / 4 on the left side at the rear end of the A4 size document 12G. It was set. At this time, the offset point “F”
Can be changed within the above conditions depending on the user's viewpoint and posture, etc., and can be changed from the center point “O” of the document 12G to the material placing table 11 in correspondence with the installation position of the video camera 40.
May be displaced by a predetermined amount to the rear surface 11c side, the left back corner site side, or the right back corner site side.

As described above, when the setting position and the shape of the reflecting mirror 33 are set, when the document presentation device 10 is viewed from above in a plan view, as shown in FIG. Although the reflecting mirror 33 overlaps the left rear portion of the document 12G, the user located on the front surface 11b side of the document table 11 receives an A4 size document as shown in FIG. Since the entire document 12G is visible, that is, since the reflecting mirror 33 is installed at a position where the user's view of the document 12G is not obstructed, the material presentation device 10 is easy to use. In addition, since the reflecting mirror 33 is set at a lower position, the size of the first arm 31 (FIG. 1) for supporting the reflecting mirror 33 above the document 12G can be set shorter. Mirror support frame 32 to which first arm 31 and reflector 33 are attached when not used
Even if (FIG. 1) is folded, it does not protrude outward from the material placing surface 11a.

FIG. 9 shows a video camera 40 installed near the left rear corner C1 of the document 12G.
This will be described with reference to FIG.

FIG. 9 is a schematic diagram schematically illustrating a video camera used in the document presentation device according to the present invention.

As shown in FIG. 9, the video camera 40
A photographing lens 41 having a large image circle (capturable range) is attached to a front part in the lens barrel 42, and an area smaller than the area of the image circle I on the imaging surface "S" is provided in a rear part in the lens barrel 42. The set image sensor 43 is attached. At this time, the area of the image sensor 43 is determined by the size of A4 image formed in the image circle I on the image pickup surface “S”.
It is assumed that the size is set in advance to a size that can capture the image size of the size document original 12G.

The video camera 40 has been described with reference to FIGS.
Video camera 4 virtually installed as described using
0B and the optical path length condition are substantially equivalent,
Is set to β, and the image light reflected by the reflecting mirror 33 by the photographing lens 41 reflects the image plane “S”.
The image is formed as a large image circle I on the top.

The image formed in the large image circle I on the image pickup surface "S" has a useless area Ia indicated by oblique lines and an effective area Ib in which the image of the document 12G is shown. Since it exists, this effective area I
A small-area and inexpensive image sensor 43 is attached in correspondence with the image of the document 12G formed on the image b. Here, since it is not necessary to use a large-area and expensive image pickup element capable of taking in the whole of the large image circle I on the image pickup surface "S", an image pickup having an area corresponding to the image of the document 12G is not required. By attaching the element 43, the cost of the video camera 40 applied to the present invention is reduced.

At this time, the position of the A4 size document 12G on the material placing surface 11a is such that the left end of the A4 size document 12G rises upward from the material placing surface 11a, as described above. Since the position of the first support piece 11f (FIG. 1) when it is placed horizontally is regulated, the position of the effective area Ib where the image of the A4 size document 12G in the image circle I is also shown. A small and inexpensive imaging device 4 having an area corresponding to the effective region Ib, which is roughly defined.
3 can be attached. At this time, the center point of the image sensor 43 is often shifted from the optical axis K of the video camera 40.

When the photographing lens 41 attached to the video camera 40 has a zoom function, the image of the A4 size document manuscript 12G formed in the image circle I on the image pickup surface "S" is obtained. Since the position changes due to zooming, the image sensor 43 may be configured to be movable within the image circle I on the image pickup surface “S” in response to the change.

[0072]

According to the first aspect of the present invention, there is provided a document presenting apparatus according to the present invention, wherein a reflecting mirror is provided above a document mounting table for mounting a document such as a document or an entity. In addition, when the video camera is mounted near the back corner of the document table, the optical axis of the reflecting mirror to the document is substantially perpendicular to the surface of the document area to be presented on the document table. And the optical axis position of the reflector to the document is displaced from the center point of the document by a predetermined amount toward the rear side or the back corner of the document table, so that the user's view of the document is obstructed. Since the reflecting mirror can be installed at a position where it does not exist, it becomes a convenient material presentation device. Further, the image of the document manuscript taken into the video camera via the reflecting mirror can be obtained in a good state without distortion.

According to the second aspect of the present invention, since the video camera has a photographing lens having a large image circle attached to a front part in the lens barrel and an image pickup device attached to a rear part in the lens barrel, the video camera is provided with a reflecting mirror. The image of the document manuscript captured by the video camera is an image without vignetting.

According to a third aspect of the present invention, in the video camera, a photographing lens having a large image circle is attached to a front part in the lens barrel, and an image sensor attached to a rear part in the lens barrel has an image on an image pickup surface. The area was set to be smaller than the area of the circle, and the image sensor was mounted on the imaging surface corresponding to the position of the document image formed in the image circle on the imaging surface. The image of the document is an image without vignetting, and an image sensor having a small area and a low cost can be applied.

According to a fourth aspect of the present invention, there is provided an arm for supporting the reflector above the mounting table, a video camera,
The operation panel is located intensively near the back corner where the back and side of the document table intersect on the opposite side of the user's dominant hand, so the material can be freely moved back and forth on the document table. Can handle materials with the hand opposite to the dominant hand of the user, or operate the operation panel,
The document presentation device can be reduced in size with good portability.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the use of a document presentation device according to the present invention.

FIGS. 2 (a), (b), and (c) are a top view, a front view, and a right side view showing a state in which a document presentation device according to the present invention is used.

FIG. 3 is a perspective view illustrating a state in which the document presentation device according to the present invention is not used.

FIG. 4 is a schematic diagram schematically illustrating the position of the video camera when an A4 size document is photographed by the video camera.

FIG. 5 is a schematic view schematically illustrating a case where the installation position and the shape of the reflecting mirror are theoretically set.

FIG. 6 is a schematic diagram schematically illustrating a case where an installation position and a shape of a reflecting mirror are actually set.

FIG. 7 is a plan view for explaining the position of the optical axis of the reflecting mirror on the document.

FIG. 8A is a plan view of the document presentation device according to the present invention as viewed from above, and FIG. 8B is a diagram showing a document as seen by a user.

FIG. 9 is a schematic diagram schematically illustrating a video camera used in the document presentation device according to the present invention.

FIG. 10 is a perspective view showing a first example of a conventional material presentation device.

FIG. 11 is a side view showing a second conventional material presentation device.

FIG. 12 is a perspective view showing a third conventional image input device (material presentation device).

FIG. 13 is a schematic diagram schematically showing a first mode in which a reflecting mirror is generally installed above a document placed on a document mounting table.

FIG. 14 is a schematic diagram schematically showing a second mode in which a reflecting mirror is generally installed above a document placed on a document mounting table.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Material presentation apparatus, 11 ... Material mounting table, 11a ... Material mounting surface, 11b ... Front surface, 11c ... Back surface, 11d ... Left side surface, 11e ... Right side surface, 12 ... Material, 12G ... A4 size document manuscript, 20 ... operation panel section, 21 ... operation button with switch function, 22 ... operation panel, 23 ... operation button, 24 ...
Operation panel cover, 30: Reflecting mirror unit, 31: First arm, 3
2: Reflector support frame, 33: Reflector (mirror), 33a ...
Reflecting surface, 40 ... Video camera applied to the present invention, 40
A: Normally installed video camera, 40B: Virtually installed video camera, 41: Shooting lens, 42: Lens barrel, 4
3: image sensor, 50: illumination unit, 51: second arm, 52
... Lighting equipment, "S" ... Video camera 4 applied to the present invention
0 imaging plane, "S1" ... video camera 4 installed normally
0A imaging surface, “S2”: imaging surface of video camera 40B virtually installed, D1: first circle, D2: second circle, I
... image circle, K1 ... optical axis of video camera 40A normally installed, K2 ... video camera 4 virtually installed
0B optical axis and optical axis of reflecting mirror 33, P1... First cone,
P2: second cone, α: angle of view to video camera 40A,
β: angle of view to video camera 40 and video camera 40B
“F”: Displacement point (offset point), “O”: Center point of A4 size document.

Claims (4)

[Claims] 1. A document mounting table for mounting a document such as a document or a substantial object, a reflector installed above the document mounting table, and a rear surface and a side surface of the document mounting table intersect. A video camera attached to a vicinity of a back corner portion and including at least a video camera for capturing image light of the material reflected by the reflector; An axis is set substantially perpendicular to the mounting area surface of the document to be presented on the document mounting table, and the optical axis position of the reflecting mirror on the document is set from the center point of the document. A material presenting device, wherein the material placing table is displaced by a predetermined amount toward the rear surface side or the back corner region side of the material mounting table. 2. The document presentation device according to claim 1, wherein the video camera has a photographing lens with a large image circle attached to a front part in the lens barrel and an image sensor attached to a rear part in the lens barrel. A material presentation device characterized by the following. 3. The document presentation device according to claim 1, wherein the video camera attaches a photographing lens having a large image circle to a front part in the lens barrel and captures an image sensor attached to a rear part in the lens barrel. Set the area smaller than the area of the image circle on the surface, and
A document presentation device, wherein the image sensor is mounted on an imaging surface corresponding to a position of a document image formed in the image circle. 4. A material mounting table for mounting a material, a reflecting mirror installed above the material mounting table, and the material mounted on the material mounting table and reflected by the reflecting mirror. A video camera for capturing the image light of, and a document presentation device having at least an operation panel unit, an arm for supporting the reflecting mirror above the document table, the video camera, and the operation panel unit. Characterized in that they are arranged intensively in the vicinity of the back corner where the rear surface and the side surface of the document table intersect with each other on the side opposite to the dominant hand of the user.